<!--********************************************************************
* by 优雅永不过时 https://github.com/z2586300277
*********************************************************************-->
<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <style>
        * {
            margin: 0;
            padding: 0;
            overflow: hidden;
        }

        body,
        #box {
            width: 100%;
            background-color: #1f1f1f;
            height: 100%;
        }
    </style>
</head>

<body>
    <div id="box"></div>
    <script type="importmap">
        {
            "imports": {
                "three": "./../../three/build/three.module.js",
                "three/addons/": "./../../three/examples/jsm/",
                "three/example/": "./../../three/examples/"
            }
        }
    </script>


    <script type="module">
        import * as THREE from 'three'
        import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

        import { EffectComposer } from 'three/example/jsm/postprocessing/EffectComposer.js';
        import { RenderPass } from 'three/example/jsm/postprocessing/RenderPass.js';
        import { OutlinePass } from 'three/example/jsm/postprocessing/OutlinePass.js'
        import { OutputPass } from 'three/example/jsm/postprocessing/OutputPass.js'

        const box = document.getElementById('box')
        const scene = new THREE.Scene()
        const camera = new THREE.PerspectiveCamera(75, box.clientWidth / box.clientHeight, 0.1, 1000)
        camera.position.set(20, 20, 20)
        const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true, logarithmicDepthBuffer: true })
        scene.add(new THREE.AxesHelper(500), new THREE.GridHelper(100, 20))

        // 物体
        for (let i = 0; i < 10; i++) {
            const geometry = new THREE.BoxGeometry()
            const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 * Math.random() })
            const cube = new THREE.Mesh(geometry, material)
            cube.position.x = Math.random() * 10
            cube.position.y = Math.random() * 10
            cube.position.z = Math.random() * 10
            scene.add(cube)
        }

        renderer.setSize(box.clientWidth, box.clientHeight)
        box.appendChild(renderer.domElement)
        new OrbitControls(camera, renderer.domElement)


        // 后期处理
        const composer = new EffectComposer(renderer);
        const renderPass = new RenderPass(scene, camera);
        composer.addPass(renderPass);

        // 轮廓
        const outlinePass = new OutlinePass(new THREE.Vector2(box.clientWidth, box.clientHeight), scene, camera);
        composer.addPass(outlinePass);

        // 色彩校正
        const outputPass = new OutputPass();
        composer.addPass(outputPass);

        // 点击事件
        const raycaster = new THREE.Raycaster()
        box.addEventListener('click', (event) => {
            const mouse = new THREE.Vector2(
                (event.offsetX / event.target.clientWidth) * 2 - 1,
                -(event.offsetY / event.target.clientHeight) * 2 + 1
            )
            raycaster.setFromCamera(mouse, camera)
            const intersects = raycaster.intersectObjects(scene.children)
            if (intersects.length > 0) {
                outlinePass.selectedObjects = [intersects[0].object]
            } else {
                outlinePass.selectedObjects = []
            }
        })


        animate()
        function animate() {
            requestAnimationFrame(animate)
            renderer.render(scene, camera)
            composer.render()
        }
    </script>

</body>

</html>